Originally Posted by rico567
I got the kit from William's Brewing, and I'm sure you can order just the stone since you already have the tank & regulator. The great thing about William's rig is that it's a SS stone on the end of a 2 foot SS wand. All I do is stick it in the boil with the chiller and it's automatically sanitized. When chilling's done, I put the stone in the bucket, pour in the wort, hook up the O2 and oxygenate it. I then pull out the wand / stone, and submerge it into a bucket of the chilling water to rinse it off; give it a spritz of oxygen, and that cleans anything out of the stone. Good to go until next time.
The stone on a stick that Williams sells is a 2 micron stone, in case anyone wonders. Read the description here
. The same description appears in the full o2 kit with the regulator, hose, and stone/stick.
I lot of people use that system from Williams without any issue, so I'm guessing it doesn't much matter whether you use a .5 or 2 micron stone.